Hydrogen-ion comparator



Feb. 14, 1928.

A.HYUGA HYDROGEN 10N coMPARAToR med April 19. 192e MMM@ 2 Sheets-Sheet 1 2 Sheets-Sheet Feb. 14, 1928. 1

A. HYUGA HYDROGEN 10N coMPARAToR Filed April 19. 1926 ff i, u f mw lllllul I 1 I l I l I 1/| lze liatented 14, 19-28.

UNITED@ STATES IPari-:NT oFFIeE.

hemmen mman, or Tono, JAPAN.

HYDROGEN-IUN COMPABATOB.

Application mea April 19, 192s. serial 11. 103,146.

This invention relates to a comparator used for determining hydrogen ion concentration by a colorimetric method, in laboratories, breweries, sugar factories, etc.

According to this invention vrectangular glass tubes are employed, and suchtubes for standard solutions are completely closed, so that decrease in quantity of the standard solution is entirely avoided and thecolor of the standard solution is not affected, since the solution is not directly exposed to the atmosphere.

According to this invention, moreover, the box provided with pockets for receiving the glass tubes isv made of light shielding material and is of closed type, so that introduc tion of light is prevented except from the front and back windows. Consequently any error hitherto caused by the undue light enterin from the top of the box may be avoide In the accompanying drawings, illustrating the comparator according to this invention,

Fig. 1 is a erspective view of one of the boxes mounte on the base or holder, partly in section, i

Fig. 2. is a perspective view in vertical section of the box with the tubes inserted :therein and with the cover removed.

Fig. 3 is an enlarged horizontal section of Fig. 2, Figs. 4 and 5 show in perspective views the closed and opened tubes, respectively, each having a rectangular cross section,

Fig. 6 is a front view of a series of th boxes mounted on the holder,

Fig. 7 is a plan thereof in section,

l Fig. 8 is a cross section of a tube employed in the/ordinary comparator, and

Fig. 9 is across section of a palr of said tubes placed side by side.

Referring to the drawings, the compara- .'tor `according to this invention consists chiefly of a plurality of boxes 1', a base or holder 2 therefor, .and a number of sets of tubes made of transparent' material, preferably made of lass. Each box 1 is provided with two poc ets for receiving two of the glass tubes, and desired numbers of such box 1 are mounted in series on the holder, thereby 'forming two rows of pockets for receiving the glass tubes. A11 glass tubes mayA be made in the form of a. 'nd of the test tube with the upper end opened as shown in Flgure 5, but preferably. the tubes to be inserted in the rear row of pockets lare made in the form of closed ampoules as shown in Figure 4.. In either case, each of the'tubes 3 and 4 has ay rectangular cross section as'shown in Figures 3 and 7. Each set of the tubes is composed of four different tubes, which are termed standard ampoule 3, auxiliary tube 4, reaction tube 5, and aqua ampoule 6, The standard ampoule 3 is filled with the standard solution which is colored in the predetermined density. The auxiliary tube 4 is lled .with a portion of unknown solution. The reaction tube 5 is filled with unknown solution added with indicator solution undergoing color reaction. The ampoule 6 is filled 'with the uncolored standard solution. In one of the boxes 1 are put a pair of tubes 3 and 4, and in the adjacent other box are put another pair of tubesv and 6. The box 1 rial, and'each has a cover 7 also made of light shielding material. In the front side wall, each box 1 is provided with a perforation 8 through which the tube 4 or 5 is to be exposed, and in the rear side wall it is provided with a window 9 for introducing light. At the inside'of thewindow 9 is arthe box 1, there is also provided a partition or retainer 13 dividing the box into two compartments. This partition 13 is also provided with a light passage 14 for leading light to the tube 4 or 5 in the front pocket.

By means of said partition 13, one of the tubes in the box is prevented from turning when the other is removed from the box.

At the front and rear sides, the box l is provided with shoulders l5 which are adapted toI be engaged with the guide slots 16 formed on the holder 2. By said means, a desired number of boxes 1 may be united together to form a complete set as illustrated in Figures 6 and 7. In these figures, boxes l, 1", 1%, 1, 1, and 1, are shown for Vexample. 3, '3' and 3 are standard ampoules containing "standard solutions of different densities "of co'lor, and arranged inl their'lorderof density. 6, '6'4 and 6 are the this invention is used will be described as follows taking an example. Take a reaction tube containing reaction solution,- i. e. unknown solution added with indicator solution, and put it in position 5 in the box 1". Put the covers 7 on the boxes 1, 1b, and 1. Then compare the colors viewed through the comparing perforations 8 of the' boxes 1, 1b, and 1. And, if the color of B does not match to either one of the colors of adjacent two positions A and C or to the intermediate color, the reaction tube 5 is removed from position B and is transferred to the position D in the box 1, as shown at 5. By proceeding in such manner until the color ofthe reaction tube matches to either-one 'of the adjacent tubes` or to an 'intermediate color, one will be abletof readily determine the H-ion concentrations` of the solution in the reaction tube by reading the concentrationsshown on the adjacentstandard ampoules. Other exam les would be readily understood by those s illed in the art.

lVhat I claim is 1. A hydrogen ion comparator comprising a front series of rectangular transparentl tubes for containing unknown solutions, a rear series of rectangular transparent tubes which are filled with standard solutions and are completely closed, and boxes each having front and rear windows and two pockets v adapted for receiving said tubes and being adapted to be light shielded except at the y with shoulders adapted to be en aged by i said guide slots in the holder, t e latter being adapted thereby to hold a plurality of the boxes containing the tubes.

3. A hydrogen ion comparator comprising test tubes provided with at least two transparent parallel walls of rectilinear conformation in the pass of light, a front series of which contain unknown somlutions and a rear series of which are filled with standard solutions and are completely closed, and

boxes secured on a holder, yeach having front and'rea'r windows and also having a cover of hght shlelding material, a screen Vof frosted glass or similar material at one window and -twopockets adapted for receiving said tubes and being adapted to be light Shielded exceptat the front and back windows.

4.. A hydrogen ion comparator. according to claim 3, wherein the box has two windows4 one on a rear and the other on a front side wall and is composed of light shielding ma 'terial and lis provided with a cover composed AsAMATsU HYUGA. 

